Instead, the McCain campaign runs an all-volunteer operation in Douglas and Sarpy counties, the two counties that make up Nebraska's 2nd Congressional District, where Rep. Lee Terry, a Republican, also faces a close race against a Democratic challenger.

The president, who is now at Offutt Air Force Base in Sarpy County, Nebraska, and has just convened a teleconference with his senior staff and the National Security Council, has ordered that commercial air traffic be resumed by noon tomorrow.